In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
nfsd: fix dead ACL conflict guard in nfsd4_create<\/p>\n
nfsd4_create() steals create->cr_dpacl\/cr_pacl into the local
\nnfsd_attrs via the designated initializer, then immediately sets the
\nsource pointers to NULL. The subsequent conflict guard tests the
\nalready-nilled source fields, making it permanently dead code:<\/p>\n
if (create->cr_acl) {
\n if (create->cr_dpacl || create->cr_pacl) \/* always false *\/<\/p>\n
When a client encodes both FATTR4_WORD0_ACL and
\nFATTR4_WORD2_POSIX_{DEFAULT,ACCESS}_ACL in the same CREATE fattr
\nbitmap, nfsd4_acl_to_attr() overwrites attrs.na_pacl\/na_dpacl without
\nreleasing the originals, leaking two posix_acl slab objects per
\nrequest. Repeated requests cause unbounded slab exhaustion.<\/p>\n
Fix by checking attrs.na_dpacl\/na_pacl (the stolen values) instead of
\nthe nilled create->cr_dpacl\/cr_pacl, matching the correct pattern
\nalready used in nfsd4_setattr().<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
nfsd: fix dead ACL conflict guard in nfsd4_create<\/p>\n
nfsd4_create() steals create->cr_dpacl\/cr_pacl into the local
\nnfsd_attrs via the<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-14863","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/14863","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14863"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14863"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}